Comment: She wasn't holding a Baby...

From his book...

“She was … blinded by evil,” “She just wanted Americans dead, no matter what. My shots saved several Americans, whose lives were clearly worth more than that woman’s twisted soul.”

Personally I think some people have to view it like that, as well they'd have to accept they killed people resisting occupiers...

Here's an interesting critique on the books mentality.
http://www.freedominourtime.blogspot.co.uk/2012/02/pseudo-co...

“I looked through the scope,” Kyle recalls. “The only people who were moving were [a] woman and maybe a child or two nearby. I watched the troops pull up. Ten young, proud Marines in uniform got out of their vehicles and gathered for a foot patrol. As the Americans organized, the woman took something from beneath her clothes, and yanked at it. She’d set a grenade.”

“It was my duty to shoot, and I don’t regret it,” Kyle attests. “The woman was already dead. I was just making sure she didn’t take any Marines with her.